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US3610602A
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Gas-permeable refractory plug and method
Assignee: United States Steel Corp
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Filing: 1969-10-14
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Granted: 1971-10-05
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Expires: 1989-10-14
Abstract
Abstract A permeable refractory plug through which gas can be introduced to liquid at high temperature. The structure around the permeable refractory tends to crack and channel the gas away from its intended path. Invention is to insert slabs of fusible viscous material, such as fused silica glass, around the plug. Slabs fuse and flow into any cracks and thus seal them.
Inventors
- 👤 Alexander J Deacon
- 👤 Marshall J Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:54
CPC Classifications
B; B22; B22D; B22D1/00; B22D1/002; B22D1/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
In a plug through which a gas can be introduced to a liquid at a high temperature, said plug including a core of permeable refractory, parts surrounding said core and being subject to cracking, and means for introducing gas to one end of said core to be discharged through the other end, the improvement which comprises fusible viscous material placed within said parts to flow into any cracks and seal them.
Claim 2
Dependent Claim
71 words
In a plug through which a gas can be introduced to a liquid at a high temperature, said plug including a core of permeable refractory, parts surrounding said core and being subject to cracking, and means for introducing gas to one end of said core to be discharged through the other end, the improvement which comprises fusible viscous material placed within said parts to flow into any cracks and seal them.
Claim 3
Dependent Claim
56 words
A plug as defined in claim 1 in which said parts include a steel casing, a refractory inner shell molded within said casing, said core being molded within said inner shell, and a refractory outer shell, said viscous material being in the form of slabs overlying said casing, said outer shell being molded over said slabs.
Claim 4
Dependent Claim
51 words
A plug as defined in claim 2 in which said outer shell has inwardly directed flanges at each end of the plug, said casing has an inwardly directed flange at the inlet end of the plug, and the means for introducing gas includes an inlet tube connected to said last-named flange.
Claim 5
Dependent Claim
25 words
A plug as defined in claim 3 in which said core is foreshortened at the inlet end of the plug to provide a distribution chamber.
Claim 6
Dependent Claim
35 words
A plug as defined in claim 1 in which said core is of high alumina, grain sized and fired to provide the required permeability, and said viscous material is a glass of high melting temperature.
Claim 7
Dependent Claim
44 words
A plug as defined in claim 2 in which said core is of high alumina, grain sized and fired to provide the required permeability, said shells are of a dense high alumina grain with minimum permeability, and said slabs are of fused silica glass.
Claim 8
Dependent Claim
42 words
The combination, with the wall of a vessel adapted to contain molten metal and having a metal shell and refractory lining, of a plug mounted therein for introducing gases to the molten metal, said plug being constructed as defined in claim 1.
References Cited (Backward Citations)
US3490755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |